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2009 ACM/IEEE/SCS 23rd Workshop on Principles of Advanced and Distributed Simulation (2009)
Lake Placid, New York, USA
June 22, 2009 to June 25, 2009
ISSN: 1087-4097
ISBN: 978-0-7695-3713-9
pp: 27-34
The Lightweight Time Warp (LTW) protocol offers a novel approach to high-performance optimistic parallel discrete-event simulation, especially when a large number of simultaneous events need to be executed at each virtual time. With LTW, the local simulation space on each node is partitioned into two sub-domains, allowing purely optimistic simulation to be driven by only a few full-fledged logical processes (LPs), while most processes are turned into lightweight LPs, free from the burden associated with Time Warp (TW) execution. This paper presents a comparative performance evaluation of the TW and LTW protocols for simulating several DEVS-based environmental models. The experiments indicate that the LTW protocol improves performance in terms of shortened execution time, reduced memory usage, lowered operational cost, and enhanced system stability.
Optimistic Parallel Simulation, Lightweight Time Warp, DEVS models, Environmental Models

G. Wainer and Q. Liu, "A Performance Evaluation of the Lightweight Time Warp Protocol in Optimistic Parallel Simulation of DEVS-Based Environmental Models," 2009 ACM/IEEE/SCS 23rd Workshop on Principles of Advanced and Distributed Simulation(PADS), Lake Placid, New York, USA, 2009, pp. 27-34.
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